Communication system and communication controlling method

Abstract

A communication method in LIPA/SIPTO architecture is provided which, when a user equipment (UE) is to connect from a serving area to an external network, allows re-selection of an optimal gateway. The communication method allows selecting a gateway apparatus physically or topologically close to a site, where the user equipment is attached.

1 . A communication method in Local IP Access (LIPA)/Selected IP Traffic Offload (SIPTO) architecture the method comprising:
 selecting a gateway apparatus physically or topologically close to a site, where a user equipment is attached, according to movement of the user equipment.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . The communication method according to  claim 1 , wherein the site, where the user equipment is attached, includes a node apparatus. 
     
     
         5 . The communication method according to  claim 1 , wherein the gateway apparatus includes a serving gateway apparatus (SGW) and a packet data network gateway apparatus (PGW). 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . A communication system in Local IP Access (LIPA)/Selected IP Traffic Offload (SIPTO) architecture wherein the system selects a gateway apparatus physically or topologically close to a site, where a user equipment is attached, according to movement of the user equipment. 
     
     
         9 . (canceled) 
     
     
         10 . (canceled) 
     
     
         11 . The communication system according to  claim 8 , wherein the site of attachment includes a node apparatus. 
     
     
         12 . The communication system according to  claim 8 , wherein the gateway apparatus includes a serving gateway apparatus (SGW) and a packet data network gateway apparatus (PGW). 
     
     
         13 . (canceled) 
     
     
         14 . (canceled) 
     
     
         15 . A user equipment in a communication system by Local IP Access (LIPA)/Selected IP Traffic Offload (SIPTO) architecture wherein the user equipment causes selection of a gateway apparatus physically or topologically close to a site, where the user equipment is attached, to be performed, according to movement of the user equipment. 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . The user equipment according to  claim 15 , wherein the site of attachment includes a node apparatus. 
     
     
         19 . The user equipment according to  claim 15 , wherein the gateway apparatus is a serving gateway apparatus (SGW) and a packet data network gateway apparatus (PGW). 
     
     
         20 . (canceled) 
     
     
         21 . (canceled)